WEBVTT >> THIS IS AN EXERCISE.WE HAVE A 3-D.KRISTEN: A 3-D, CODE FOR TRAINDERAILMENT, THE BASIS OF ATRAINING EXERCISE HELD BY THEREGIONAL TRANSIT OFFICIALS ANDLOCAL LAW ENFORCEMENT.>> ONCE A YEAR WE PUT ON A DRILLAND IT IS ALWAYS A TERRORISTRELATED DRILL.>> IT MAY HAVE CAUSED THEDERAILMENT.I DO NOT KNOW WHAT IS.WE CONTACTED HOMELANDSECURITY AND WE SAID, WOULD BE-- WHAT WOULD BE A GOODEXERCISE?KRISTEN: THEY POINTED TO ARECENT ARTICLE THAT ENCOURAGEDSUPPORTERS TO TARGET TRAINS.>> THEY GAVE ROUTES ALL OVERAMERICA AND THEY TALKED ABOUTWHERE THE TRAINS ARE, WHO RUNSTHEM.IT IS SCARY IF YOU LOOK AT IT.>> LOOKS LIKE IT IS ANINTENTIONAL DERAILMENT.KRISTEN: IT ALSO GAVE DETAILS ONHOW TO CREATE A DEVICE THATWOULD DERAIL A TRAIN, SOOFFICIALS BUILD ONE TO USEDURING THE DRILL.THEY SAY THAT DRIVERS AREALREADY KEEPING A CLOSE EYE ONTHE TRACKS.THIS EVENT IS ONE MORE WAY TOADVANCE THEIR TRAINING.>> WE DO EVERYTHING WE CAN TOMAKE IT THE SAFEST SYSTEMPOSSIBLE AND WE WILL CONTINUE TOCOME UP WITH INNOVATIVE IDEAS TOMAKE SURE WE PREVENT SOMETHINGHORRIBLE FROM HAPPENING.KRISTEN: OFFICIALS SAY THEY HAVEDONE THE EXERCISES EVERY YEARSINCE 9/11.